65803 Didymos

This minor planet is named after the Greek word for "twins." This name was inspired by the fact that it was observed to have a smaller body orbiting it. The larger named body is about 800 meters across, and the smaller unnamed body, unofficially nicknamed "Didymoon," is 170 meters across.

The symbol of this minor planet is like the symbol for Gemini, but the two vertical bars are replaced by a large circle with a tiny circle in the center. This references twinness, and also the size difference of these two twins in particular.


The provisional symbol of the minor planet satellite, so long as it is unnamed, is derived from this symbol. Instead of the pair of circles between the Gemini top and bottom, 65803 I has a crescent moon in the middle.

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